Composite · UD lamina, carbon · orthotropic

T300/5208 carbon/epoxy

Name: T300/5208 carbon/epoxy — material properties (Kaw, Table 2.1)
Creator: BadgerMecX

Kaw, Table 2.1 · V_f = 0.70

T300/5208 carbon/epoxy is a unidirectional carbon-fibre lamina to Kaw, Table 2.1. Its typical longitudinal tensile strength is 1500 MPa. Along the fibres E₁ = 181 GPa; across them E₂ = 10.3 GPa.

Record: ud-t300-5208
Library: v1.1.0
Properties: 13
Sources: 1
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E₁ · Modulus, direction 1 181GPa typical^[1]

ν₁₂ · Poisson's ratio 1-2 0.28– typical^[1]

X_t · Longitudinal tensile strength 1500MPa typical^[1]

Y_t · Transverse tensile strength 40MPa typical^[1]

ρ · Density 1600kg/m³ derived^[1]

α₁ · Thermal expansion, direction 1 0.0210⁻⁶/K typical^[1]

Elastic constants

orthotropic

Symbol	Property	Value	Unit	Basis	Ref.
E₁	Modulus, direction 1	181	GPa	typical	[1]
E₂	Modulus, direction 2	10.3	GPa	typical	[1]
ν₁₂	Poisson's ratio 1-2	0.28	–	typical	[1]
G₁₂	Shear modulus 1-2	7.17	GPa	typical	[1]

Physical, thermal and electrical

at 20 °C

Symbol	Property	Value	Unit	Basis	Ref.
V_f	Fibre volume fraction	0.7	–	typical	[1]
ρ	Density ⓘ specific gravity 1.6	1600	kg/m³	derived	[1]
α₁	Thermal expansion, direction 1	0.02	10⁻⁶/K	typical	[1]
α₂	Thermal expansion, direction 2	22.5	10⁻⁶/K	typical	[1]

Strength

a band applies up to and including its upper limit

Symbol	Property	Value	Unit	Basis	Ref.
X_t	Longitudinal tensile strength	1500	MPa	typical	[1]
X_c	Longitudinal compressive strength	1500	MPa	typical	[1]
Y_t	Transverse tensile strength	40	MPa	typical	[1]
Y_c	Transverse compressive strength	246	MPa	typical	[1]
S₁₂	In-plane shear strength	68	MPa	typical	[1]

Notes

Plane-stress (lamina) data: E₃, ν₁₃, ν₂₃, G₁₃ and G₂₃ are not given, so a 3D stiffness matrix is not formed. For a transversely isotropic lamina E₃ = E₂, G₁₃ = G₁₂ and ν₁₃ = ν₁₂; G₂₃ or ν₂₃ must come from elsewhere.

Sources

every value names one

A. K. Kaw, Mechanics of Composite Materials, 2nd ed., Table 2.1 (as reproduced in course material)Copies checked: 1, 2, 3, 4

min product standard minimum char characteristic design code value for design typical datasheet or textbook derived worked out here, formula shown

Cite this page

for reports and papers

BadgerMecX Materials (2026). T300/5208 carbon/epoxy — material properties, Kaw, Table 2.1. Library v1.1.0, record ud-t300-5208. https://badgermecx.com/materials/ud-t300-5208/ (accessed 2026-10-08).

@misc{badgermecx_udt3005208,
  title  = {T300/5208 carbon/epoxy -- material properties, Kaw, Table 2.1},
  author = {{BadgerMecX Materials}},
  year   = {2026},
  note   = {Library v1.1.0, record ud-t300-5208},
  url    = {https://badgermecx.com/materials/ud-t300-5208/}
}

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